/**
 * @Author 12629
 * @Description：
 */
public class Test {
    public static void main(String[] args) {

        Integer aa = 200;
        Integer bb = 200;
        System.out.println(aa == bb);


        Integer a = 100;
        Integer b = 100;
        System.out.println(a == b);


    }
    public static void main2(String[] args) {
        Integer a = 100;
        int i = a; //自动拆箱

        int ii = a.intValue();
        double d = a.doubleValue();

        System.out.println(a);
        System.out.println(i);
    }
    public static void main1(String[] args) {
        int i = 10;
        Integer a = i;  //自动的装箱

        Integer b = Integer.valueOf(19);//显式装箱

    }
}
